Hoping for a little C++ assistance - I'm very new to the topic. I'm attempting to dynamically create an array based on user input with a pointer, then pass the array to a function. But the pointer (and thus array) pass feels a little wrong because there is no dereferencing that occurs.
During/after passing, do we just treat the pointer as if it were any normally declared-and-passed array, without the need to dereference (*) anything? Or am I applying this incorrectly?
Pseudocode follows:
#include<iostream>
using namespace std;
void arrayFunc(int [], int); // << Note no indication of pointer pass
int main()
{
int *arrayPtr = 0; // Array pointer
int arrayElem = 0; // Number of elements in array
cout << "\nPlease enter the number of elements: ";
cin >> arrayElem;
arrayPtr = new int[arrayElem]; // Dynamically create the new array
arrayFunc(arrayPtr, arrayElem); // << Note no dereferencing or other indication of pointer
return 0;
}
void arrayFunc(int array[], int arrayElem) // << Same here - now it's just a plain old array
{
// All the functiony-bits go here, referencing array without the need to dereference
}
[EDIT] While the above code works, the following includes the fixes determined in the discussion below:
#include<iostream>
using namespace std;
void arrayFunc(int*, int); // Changed to pointer pass instead of []
int main()
{
int *arrayPtr = 0; // Array pointer
int arrayElem = 0; // Number of elements in array
cout << "\nPlease enter the number of elements: ";
cin >> arrayElem;
arrayPtr = new int[arrayElem]; // Dynamically create the new array
arrayFunc(arrayPtr, arrayElem);
return 0;
}
void arrayFunc(int* array, int arrayElem) // Passing a pointer now instead of []
{
// All the functiony-bits go here, referencing array without the need to dereference
}
arrayPtrjust work like any normal array after thenew int[arrayElem]statement?int arr[10]; int *ptr = arr;). It will work like an array for the most part, but not always (e.g.,sizeof(arr)vs.sizeof(arrayPtr)).